The only issue I've had with jumping where it didn't feel like my fault was, I think, in one of Hell's dark world levels. There's a small overhang that you need to wall jump off to get over and through some saw blades. For some reason half the time Meat Boy will just go straight up into the blades instead off jumping away from the wall like he should.

If you're experiencing lagg during the game it's most likely due to your computer and the resolution you're running it at. Personally, I have to play it at 800x600 in windowed mode in order to avoid any lagg. It's annoying at first but you get used to it.

There's also an option to put it to low-resolution. Personally I just reduce the resolution size, rather than put it to low-res because at low-res everything looks really bad to be honest, so I would rather have things small than ugly I suppose.

I think all those posts whining about controls should actually be whining about lag.

Seriously, I do recommend for those having issues even lightly to just throw it on 800x600 full screen, and if by some strange act of god it still is hitching up on you to go window mode. It literally fixed the issue and the game even LOOKS better at 800x600. At least imo it does. I don't think a game like this is meant to be blown up at full resolution as that graphics look strange.

@Nuklear41: Just giving credit where credit is due man. 120 deaths out of 678. Rest of the deaths were the game's fault for putting a particular obstacle in my way.